The temperature of the sulfur incineration furnace reaches 1250℃
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Due to the increased load, the temperature in our sulfur incineration furnace has reached 1250°C, and this temperature measurement point is located near the furnace wall. We are concerned that the temperature in the center of the furnace might be even higher. Our analysis shows that the SO2 concentration in the exhaust gas at the exit of the waste heat boiler is around 12%. Given such a high temperature in the sulfur incineration furnace, we are puzzled and worried about any potential negative effects I would appreciate everyone’s advice: is this okay, or are there any ways to lower the furnace temperature, aside from reducing the load, of course. Thank you!
If the refractory bricks lining the furnace wall have a high temperature resistance (such as high-alumina bricks), there is no major problem. If the fan has capacity, more air can be supplied to increase production and lower the furnace temperature.
It’s best to check the high-temperature resistance of the refractory bricks. The refractory bricks we use can withstand temperatures up to 1300°C at most; if this limit is exceeded, it will have a significant impact on the furnace, with the most common consequence being the destruction of the furnace walls.
At such high furnace temperatures, nitrogen oxides in the exhaust gases are very likely to exceed the allowed levels!
It is recommended to increase the air supply volume, as the sulfur content at the outlet is 12%, which is a bit high.
It may also depend on whether the furnace is made of clay bricks or high-alumina bricks; if it’s a furnace made of high-alumina bricks, there should be no problems. However, the temperature sleeve in a sulfur combustion furnace might get damaged quite quickly. I’ve done this before when the price of sulfuric acid was very high, though the conversion rate was slightly lower. I would like to ask the forum moderator what material is used for the thermocouple sleeves? The casing of my sulfur incinerator still has a short lifespan; it gets damaged after only 2 to 3 years.
It seems that when the concentration of sulfur dioxide gas exceeds 10.5, sublimated sulfur is likely to be produced, which can cause blockages in the equipment downstream; the poster should be careful! The temperature at which sulfur burns is directly proportional to the concentration of sulfur dioxide gas; generally, the temperature is restricted to no more than 1050 degrees. Such high temperatures will definitely cause problems! ! If the temperature is high, increase the air supply! Add sulfonate when the temperature drops.
Be careful still! Prolonged exposure to high temperatures (>1150 degrees) can be too much for both the retaining walls and the linings. It is necessary to regularly check whether there are any areas on the exterior of the sulfur burning furnace where the temperature is excessively high; checking at night is preferable. If any redening is observed, measures must be taken promptly, otherwise problems will arise soon (note that a dark red color can only be detected with careful inspection). Safety first; operating at a lower temperature is safer.
1250℃ is definitely no problem for refractory bricks, but it’s hard to say the same if the bricks are not laid properly.
For sulfuric acid production, this temperature is too high.